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Location: 47 km SE from Los Andes, Chile
Avenida Santa Teresa, N° 513Los AndesChile
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Mining scale, mining and mill throughput capaciites.Full profiles of select mines and projects.
Shaft depth, mining scale, backfill type and mill throughput data.Full profiles of select mines and projects.
Equipment type, model, size and quantity.Full profiles of select mines and projects.
Camp size, mine location and contacts.Full profiles of select mines and projects.
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The Andina mining operation consists of Río Blanco underground mine and the Sur Sur open pit mine.Los Bronces-Rio Blanco is one of three giant Miocene to Pliocene Cu-Mo breccia/porphyry copper deposits in central Chile.Paragenetic studies indicate main stages of veins, breccia and porphyry emplacement in the Rio Blanco and Sur-Sur sectors of the ore deposit. The stages are: (1) magnetite-actinolite alteration; (2) potassic stockwork veins; (3) Rio Blanco Magmatic Breccia and Sur-Sur Tourmaline Breccia; (4) Feldspar Porphyry; (5) Quartz Monzonite Porphyry and Don Luis Porphyry; (6) molybdenite stockwork veins; (7) chalcopyrite stockwork veins; and (8) D veins. Barren dacite and rhyolite intrusions cross-cut the ore deposit complex.A change from potassic to phyllic alteration defines the contact between the Rio Blanco Magmatic Breccia and Sur-Sur Tounnaline Breccia. The Rio Blanco Magmatic Breccia occupies a large volume of rock within the Rio Blanco, La Union, Don Luis and Sur-Sur sectors, and extends over a vertical interval of ~2 km. The Tourmaline Breccia lies transitionally outward from the Magmatic Breccia mainly in the Sur-Sur sector. There is a 100m thick gradational contact between deep level biotite breccia and shallow-level tourmaline breccia at Sur-Sur. Paragenetic studies of breccia cement minerals in the Rio Blanco Magmatic Breccia and Sur-Sur Tounnaline Breccia reveal a similar cement infill sequence involving initial biotite and/or tounnaline precipitation at clast margins, followed by sulfate (anhydrite) and oxide (specularite) mineral phases, and in tum by chalcopyrite and magnetite.
